DE1429C - Take-up shaft for paper rolls - Google Patents

Description

1877.

Grade 15.

FRIEDRICH VOITH in HEIDENHEIM λ. Β. (Württemberg). Clamping shaft for paper rolls.

Patented in the German Empire on December 30, 1877.

Since the introduction of rotary printing machines, wallpaper printing machines and roll calenders etc. the paper mills are required to produce the paper in large rolls up to 1000 mm in diameter to deliver and earlier and partly now these rolls were on iron Gas pipe sleeves with a clearance of 70 mm. More recently, instead of iron sleeves mostly paper tubes are used, partly because individual rolling machines with their type of roll winding presuppose this, partly in order to achieve a smoother deal, since returns the iron sleeves are spared. * To now put the rolls in the rotary printing press etc., they have to be fastened to a shaft, which has since been done by the side Driving in of cones displaceable on the shaft happened. With paper tubes this had the result is the great disadvantage that often 50 to 100 layers of paper are caused by careless driving the cone was spoiled and often the rollers were not exactly centered, which is of the greatest disadvantage when the rolls run off when printing.

The inventor has now designed a clamping shaft that moves quickly and easily into the rollers can be inserted and removed, can be used for both paper and iron tubes is, holds the rollers so tightly that sliding can never take place, which is the case with the driven ones Cones is often the case, and furthermore the rollers are precisely centered.

The construction is as follows:

On the insert shaft, Fig. 1, two collars α α are looped in the middle. A rubber ring bb is attached to each of these collars, then a cast-iron bushing cc approx. 100 mm long, then another rubber ring dd, then another bushing ce . For a paper roll width of 800 mm, as is assumed in the drawing, for example, there is a rubber ring // and a bushing gg, followed by a nut h / 1, for which a thread is cut on the ends of the insert shaft. The number of rubber rings and bushings depends of course on the width of the paper. In the middle of each cast iron a short spring ti is screwed onto the insert shaft, over which the cast iron sleeves provided with a groove can be pushed back and forth; the rubber rings stretch so much that they can be pushed away over the spring (Fig. 2).

The tapered collars, the Gufsüchsen and the rubber rings are 2 mm smaller than that clear width of the paper or iron tubes of the paper rolls. In the accompanying drawing, for example, this clear width is assumed to be 70 mm, thus the bushings and rubber rings have a diameter of 68 mm.

In order to clamp a roll, the clamping shaft is pushed into the opening of the former, which is 2 mm larger, whereupon the two nuts are tightened hh. The consequence of this is that by compressing the rubber rings in the direction of the axis they try to enlarge their diameter and press firmly against the sleeve walls. The role now sits so firmly on the clamping shaft that it z. B. can be processed in the rotary printing machine with strong braking and at 90 to 120 m speed per minute without dafs ever taking place the slightest slide. It is also evident that the roll is now spanned very precisely and centrically. 'i ■

For this purpose I sheet drawings.